//
// Created by shuhongfan on 2021/6/18.
//

#include <stdio.h>

int main(){
    char i,j,k;
    for(i='x';i<='z';i++)
        for(j='x';j<='z';j++)
            if(i!=j)
                for(k='x';k<='z';k++)
                    if(i!=k&&j!=k)
                        if(i!='x'&&k!='x'&&k!='z')
                            printf("A--%c\nB--%c\nC--%c\n",i,j,k);
}